Name: greene Savannah, GA (Sunset 28) (Zone 8b) I have no use for internet bullies!
I understand there is a retaining wall at the back but is the area where the beds are flat or sloped? It might help if you could show a photo of the entire front yard so we can see the existing plants/trees, etc. and how the beds will be viewed from the sidewalk or street.
Do you have any color preference?
Sunset Zone 28, AHS Heat Zone 9, USDA zone 8b~"Leaf of Faith"